______the problem clearly, Mary has to look for lots of information.
---Could I borrow your dictionary? Of course, you. A. can B. must C.should
---Could you please help me to take these books there? ---_____.
_____ he is busy, ______ he helps his parents with the housework on weekends.
I exercise every day, so I am _____ healthy.
Students should study hard to make their dreams .